Peterson lives near the creek and says she sees teens walk down to the water in the evening hours. However, those familiar with the creek like Daniel Dorety, say it's not safe.

"It's kind of a barren place," said Dorety. "Not much to do back there... a bunch of cliffs."

This isn't the first time police say Martinez has threatened someone in this barren place. According to the police report, the 18-year-old threatened to cut off a girl's swim suit with the same knife used to cut the first victim's hair.

"I have a nine-year-old. So it's disconcerting to me to know that people are back behind my house," said Peterson.

She says her only relief comes from knowing police are now aware of what's happening by the water.